Both Ryan Zimmerman and Alexi Ramirez were dropped in my league for some odd reason. I am going to claim one of them off waivers, but who should I take? I know that Zimmerman is a better offensive player, but he's also prone to injury.

Make claims for both of them Zimmerman first and then the Missile dropping Werth and Soriano.

If your Zimmerman claim is successful then you will have Zimm at 3b and Bautista solidifying your OF for the remainder of the year. You can use Castro as trade bait to upgrade your pitching and you can then slot the Missile at SS.

Maybe a trade of Bastardo+Morse+Castro might net you Tulowitzki/Trumbo or perhaps something like Konerko/Heath Bell go for a ? Try that and see what happens.